RPMs dropping, idling problems, Car wants to stall

Need you help guys, My 05 V lately hasn't been running good. When I am driving and I come to a stop or backing out of the driveway, or even right after I start it, The car acts like it is going to stall. I have to gas it a couple times or it feels like the car will shut down. I took the K&N off and looked at the throttlebody and it looked dirty to me, is this normal? see pictures below. any ideas what the problem could be? Thank you in advanced for your help!